scholarly journals Nanninga, T.A., et al. Discussion on Sustainable Water Technologies for Peri-Urban Areas of Mexico City: Balancing Urbanization and Environmental Conservation. Water 2012, 4, 739–758

Water ◽  
2013 ◽  
Vol 5 (4) ◽  
pp. 2037-2037
Author(s):  
Tiemen Nanninga ◽  
Iemke Bisschops ◽  
Eduardo López ◽  
José Martínez-Ruiz ◽  
Daniel Murillo ◽  
...  
Keyword(s):  
Mexico City ◽  
Urban Areas ◽  
Environmental Conservation

scholarly journals Discussion on Sustainable Water Technologies for Peri-Urban Areas of Mexico City: Balancing Urbanization and Environmental Conservation

Water ◽  
2012 ◽  
Vol 4 (3) ◽  
pp. 739-758 ◽  
Author(s):  
Tiemen A. Nanninga ◽  
Iemke Bisschops ◽  
Eduardo López ◽  
José Luis Martínez-Ruiz ◽  
Daniel Murillo ◽  
...  
Keyword(s):  
Mexico City ◽  
Urban Areas ◽  
Environmental Conservation

DISCUSSION ON SUSTAINABLE WATER TECHNOLOGIES FOR PERI-URBAN AREAS OF MEXICO CITY: BALANCING URBANIZATION AND ENVIRONMENTAL CONSERVATION

2014 ◽  
pp. 27-56
Author(s):  
Tiemen Nanninga ◽  
Iemke Bisschops ◽  
Eduardo López ◽  
José Marthnez-Ruiz ◽  
Daniel Murillo ◽  
...  
Keyword(s):  
Mexico City ◽  
Urban Areas ◽  
Environmental Conservation

Discussion on Sustainable Water Technologies for Peri-Urban Areas of Mexico City: Balancing Urbanization and Environmental Conservation

2017 ◽  
pp. 201-230
Author(s):  
Tiemen A. Nanninga ◽  
Iemke Bisschops ◽  
Eduardo López ◽  
José Luis Martínez-Ruiz ◽  
Daniel Murillo ◽  
...  
Keyword(s):  
Mexico City ◽  
Urban Areas ◽  
Environmental Conservation

scholarly journals Discussion on Sustainable Water Technologies for Peri-Urban Areas of Mexico City: Balancing Urbanization and Environmental Conservation

Water ◽  
2012 ◽  
Vol 4 (3) ◽  
pp. 769-788
Author(s):  
Tiemen A. Nanninga ◽  
Iemke Bisschops ◽  
Eduardo López ◽  
José Luis Martínez-Ruiz ◽  
Daniel Murillo ◽  
...  
Keyword(s):  
Mexico City ◽  
Urban Areas ◽  
Environmental Conservation

Tunnel performance during the Puebla-Mexico 19 September 2017 earthquake

2020 ◽  
Vol 36 (2_suppl) ◽  
pp. 288-313
Author(s):  
Juan M Mayoral ◽  
Gilberto Mosqueda ◽  
Daniel De La Rosa ◽  
Mauricio Alcaraz
Keyword(s):  
Mexico City ◽  
Seismic Performance ◽  
Urban Areas ◽  
Numerical Study ◽  
Three Dimensional ◽  
Frequency Content ◽  
Seismic Performance Evaluation ◽  
Ground Deformations ◽  
Under Construction ◽  
Observed Damage

Seismic performance of tunnels during earthquakes in densely populated areas requires assessing complex interactions with existing infrastructure such as bridges, urban overpasses, and metro stations, including low- to medium-rise buildings. This article presents the numerical study of an instrumented tunnel, currently under construction on stiff soils, located in the western part of Mexico City, during the Puebla-Mexico 19 September 2017 earthquake. Three-dimensional finite difference models were developed using the software FLAC3D. Initially, the static response of the tunnel was evaluated accounting for the excavation technique. Then, the seismic performance evaluation of the tunnel was carried out, computing ground deformations and factors of safety, considering soil nonlinearities. Good agreement was observed between predicted and observed damage during post-event site observations. Once the soundness of the numerical model was established, a numerical study was undertaken to investigate the effect of frequency content in tunnel-induced ground motion incoherence for tunnels built in cemented stiff soils. A series of strong ground motions recorded during normal and subduction events were used in the simulations, considering a return period of 250 years, as recommended in the Mexico City building code. From the results, it was concluded that the tunnel presence leads to important frequency content modification in the tunnel surroundings which can affect low- to mid-rise stiff structures located nearby. This important finding must be taken into account when assessing the seismic risk in highly populated urban areas, such as Mexico City.

scholarly journals Emission Factors of Black Carbon and Co-pollutants from Diesel Vehicles in Mexico City

2017 ◽  
Author(s):  
Miguel Zavala ◽  
Luisa T. Molina ◽  
Tara I. Yacovitch ◽  
Edward C. Fortner ◽  
Joseph R. Roscioli ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Developing Countries ◽  
Black Carbon ◽  
Mexico City ◽  
Urban Areas ◽  
Fine Particulate Matter ◽  
Emission Factors ◽  
Remote Sensing Technique ◽  
Driving Conditions ◽  
Comparison Of The Results

Abstract. Diesel-powered vehicles are intensively used in urban areas for transporting goods and people but can substantially contribute to high emissions of black carbon (BC), organic carbon (OC), and other gaseous pollutants. Strategies aimed at controlling mobile emissions sources thus have the potential to improve air quality as well as help mitigate impacts of air pollutants on climate, ecosystems, and human health. However, in developing countries there are limited data on the BC and OC emission characteristics of diesel-powered vehicles and thus there are large uncertainties in the estimation of the emission contributions from these sources. We measured BC, OC and other inorganic components of fine particulate matter (PM), as well as carbon monoxide (CO), nitrogen oxides (NOx), sulfur dioxide (SO2), ethane, acetylene, benzene, toluene, and C2-benzenes under real-world driving conditions of 20 diesel-powered vehicles encompassing multiple emission level technologies in Mexico City with the chasing technique using the Aerodyne mobile laboratory. Average BC emission factors ranged from 0.41–2.48 g/kg-fuel depending on vehicle type. The vehicles were also simultaneously measured using the cross-road remote sensing technique to obtain the emission factors of nitrogen oxide (NO), CO, total hydrocarbons, and fine PM, thus allowing the inter-comparison of the results from the two techniques. There is overall good agreement between the two techniques and both can identify high and low emitters but substantial differences were found in some of the vehicles, probably due to the ability of the chasing technique to capture a larger diversity of driving conditions in comparison to the remote sensing technique. A comparison of the results with the US-EPA MOVES-2014b model showed that the model underestimates CO, OC, and selected VOC species whereas there is better agreement for NOx and BC. Larger OC / BC ratios were found in comparison to ratios measured in California using the same technique, further demonstrating the need for using locally-obtained diesel-powered vehicle emission factors database in developing countries in order to reduce the uncertainty in the emissions estimates and to improve the evaluation of the effectiveness of emissions reduction measures.

scholarly journals La situación actual del sistema de monitoreo ambiental en la Zona Metropolitana de la Ciudad de México / The Current Status of Environmental Monitoring in the Mexico City Metropolitan Zone

2009 ◽  
Vol 24 (3) ◽  
pp. 513 ◽  
Author(s):  
María Perevochtchikova
Keyword(s):  
Air Quality ◽  
Environmental Monitoring ◽  
Monitoring System ◽  
Mexico City ◽  
Urban Areas ◽  
Current Status ◽  
New Public ◽  
Environmental Monitoring System ◽  
The Social ◽  
Metropolitan Zone

Se ha visto que sin un sistema de monitoreo ambiental integral y eficiente, que propor­cione datos duros de soporte para un diagnóstico de la situación ambiental, no es posible elaborar nuevas políticas públicas para resolver la problemática que enfrentan las áreas urbanas. En el presente trabajo se revisa la situación actual del sistema de monitoreo ambiental de la Zona Metropolitana de la Ciudad de México desde tres ángulos: climatológico, hidrométrico y de calidad de aire. Asimismo se detectan sus principales avances, limitaciones y otras particularidades y al final se complementa el monitoreo ambiental con la parte social y económica. AbstractIt has been proved that without an efficient, integral environmental monitoring system that provides hard back-up data for a diagnosis of the environmental situation, it is impossible to draw up new public policies to solve the problem faced by urban areas. This paper reviews the current status of environmental monitoring in the Mexico City Metropolitan Zone from three angles: climatological, hydrometric and air quality. It also detects the main progress, limitations and other particularities and at the end, environmental monitoring is complemented by the social and economic part.

scholarly journals Surviving on the Periphery of a City of Earthquakes

Eos ◽  
2021 ◽  
Vol 102 ◽  
Author(s):  
Humberto Basilio
Keyword(s):  
Mexico City ◽  
Urban Areas ◽  
Marginalized Communities ◽  
The World

Mexico City is one of the most disaster-prone urban areas in the world. Following an earthquake, marginalized communities living on the city’s periphery are exposed to more dangers than just collapsing buildings.

scholarly journals Modelling constraints on the emission inventory and on vertical dispersion for CO and SO<sub>2</sub> in the Mexico City Metropolitan Area using Solar FTIR and zenith sky UV spectroscopy

2007 ◽  
Vol 7 (3) ◽  
pp. 781-801 ◽  
Author(s):  
B. de Foy ◽  
W. Lei ◽  
M. Zavala ◽  
R. Volkamer ◽  
J. Samuelsson ◽  
...  
Keyword(s):  
Power Plant ◽  
Mexico City ◽  
Urban Areas ◽  
Emission Inventory ◽  
Uv Spectroscopy ◽  
Transport Processes ◽  
Point Sources ◽  
Large Power ◽  
Vertical Dispersion ◽  
Current Emission

Abstract. Emissions of air pollutants in and around urban areas lead to negative health impacts on the population. To estimate these impacts, it is important to know the sources and transport mechanisms of the pollutants accurately. Mexico City has a large urban fleet in a topographically constrained basin leading to high levels of carbon monoxide (CO). Large point sources of sulfur dioxide (SO2) surrounding the basin lead to episodes with high concentrations. An Eulerian grid model (CAMx) and a particle trajectory model (FLEXPART) are used to evaluate the estimates of CO and SO2 in the current emission inventory using mesoscale meteorological simulations from MM5. Vertical column measurements of CO are used to constrain the total amount of emitted CO in the model and to identify the most appropriate vertical dispersion scheme. Zenith sky UV spectroscopy is used to estimate the emissions of SO2 from a large power plant and the Popocatépetl volcano. Results suggest that the models are able to identify correctly large point sources and that both the power plant and the volcano impact the MCMA. Modelled concentrations of CO based on the current emission inventory match observations suggesting that the current total emissions estimate is correct. Possible adjustments to the spatial and temporal distribution can be inferred from model results. Accurate source and dispersion modelling provides feedback for development of the emission inventory, verification of transport processes in air quality models and guidance for policy decisions.

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